html{
    font: normal normal 16px 'Times New Roman','宋体';/*字体*/
}
body,ul,ol,li,p,h1,h2,h3,h4,h5{
    margin: 0;
    padding: 0;
}
ul,ol{
    list-style: none;
}
a{
    color: black;
    text-decoration: none;
}
.gs::after{
    display: block;
    clear: both;
    content: ".";
}